js date linkage example_javascript skills

调试需加入jquery文件

复制代码 代码如下:

<script> <br>$(function(){ <br>$('#year').change(function(){ <br>if (ifLeapYear($(this).val())) <br>{ <br>if ($('#month').val() == 2 && $('#day').children().length == 29) <br>{ <br>$('#day').append('<option value="29">29</option>'); <br>} <br>} else <br>{ <br>if ($('#month').val() == 2 && $('#day').children().length == 30) <br>{ <br>$('#day :last-child').remove(); <br>} <br>} <br>}); <br><br>$('#month').change(function(){ <br>var thisValue = $(this).val(); <br>var dayValue = $('#day').val(); <br>var month1 = ['4','6','9','11']; <br>$('#day').html('<option value="">-请选择-</option>'); <br>var day = ''; <br>if (thisValue == '') <br>{ <br>return false; <br>} <br>if ($.inArray(thisValue, month1) != -1) <br>{ <br>day = setDay(30); <br>$('#day').append(day); <br>} else if ($(this).val() == '2') <br>{ <br>if ($('#year').val() != '' && ifLeapYear($('#year').val())) <br>{ <br>day = setDay(29); <br>} else <br>{ <br>day = setDay(28); <br>} <br>$('#day').append(day); <br>} else <br>{ <br>day = setDay(31); <br>$('#day').append(day); <br>} <br>$('#day').find('option[value=' dayValue ']').attr('selected',true); <br>}); <br>}) <br>function setDay(day) <br>{ <br>var dayInfo = ''; <br>for (var i=1; i<=day; i ) <BR>{ <BR>dayInfo = '<option value="' i '">' i '</option>'; <br>} <br>return dayInfo; <br>} <br>function ifLeapYear(year) <br>{ <br>if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) <br>{ <br>return true; <br>} else <br>{ <br>return false; <br>} <br>} <br></script>
-请选择-



年
-请选择-



月
-请选择-日